Grinding machine attachment



Oct. 28,1947. w. E. PARKS El AL 2,429,893

GRINDING MACHINE ATTACHMENT Filed 001;. 30, 1945 3 Sheets-Sheet 1 INVENTORS WESLEY E. PARKS HERBERT HECKENDORF EDGAR J HOLZBERGER JR.

A TTORNE Y- Oct. 28, 1947. w. E. PARKS ET AL 2,429,893

GRINDING MACHINE ATTACHMENT Filed Oct. 50, 1945 3 Sheets-Shem; 2

I 33 3 5 .7 I l2 1 I \-6 4 INVENTOR. WESLEY E. PARKS BY EDGAR J. HOLZBERGER ATTORNEY HERBERT HE CKENDOR Oct.28',1947. w, EQPARKSETAL 2,429,893

GRINDING MACHINE ATTACHMENT Filed Oct. 50, 1945 3 Sheets-Sheet $5 INVENTORS WESLEY E. PARKS HERBERT HECKENDORF EDGAR J. HOLZBERGER JR.

ATTORNEY Patented Oct. 28, 1947 GRINDING MACHINE ATTACHMENT Wesley E. Parks Bedford, Herbert Heckendorf and Edgar J. Holzberger, Jr., Cleveland, Ohio, assignors, by mesne assignments, to Jack 8; Heintz Precision Industries, Inc.. Cleveland, Ohio, a corporation of Delaware I Application October 30, 1945', Serial No. 525.412

4 Claims.

This invention relates in general to adjustable work holding attachments. for metal working machines and has for one of its primary objects to provide an attachment that is capable of more adjustments of the work in a greater number of planes with respect to the metal working tool for obtaining a greater variety of operations. on the work without removing the work from its work holder during such varieties of operations on the work.

To these and other ends it is proposed to provide a Work holding attachment including two slides operable independently in parallel planes to move the work by adjustment of one slide angularly with respect to the other slide and two independently operable swivels having axes at right angles to each other for adjusting the plane of the work holder with respect to the metal working tool while the work remains in its holder.

With the foregoing and other objects in view the invention resides in the combination of parts and details of construction hereinafter set forth in the following specification and appended claims certain embodiments thereof being illustrated in the accompanying drawings in which:

Figure 1 is a view in elevational perspective of the attachment with the work removed;

Figure 2 is a view in vertical section of the device in Figure 1 showing particularly the upper swivel and the motivating means for the upper slide;

Figure 3 is a fragmentary view in vertical section taken at right angles to Figure 2;

Figure 4 is a view in elevation of the device showing the work being engaged by a metal working tool;

Figure 5 is a view similar to Figure 4 showing the device tilted to the left about its lower swivel;

Figure 6 is a view similar to Figures 4 and 5 showing the device tilted to the right;

Figure 7 is a top plan view of the device showing the work holding portion of the device in three nominal positions about the upper swivel;

Figure 8 is a view in section taken along line 88 of Figure 7 showing a driving gear engaging a gear rack for moving the lower slide.

Referring more particularly to the drawings, in Figure 1 a base I is shown attached to mounting clamp 2 by means of swivel 3 and lock screw 4. Supported by and dovetailed to base I is a lower slide 5 which in turn supports an upper slide 6 and a work holding piece I. Detachable cranks 8 and 9 are shown as a manual means for adjusting the position of work holding piece 'I by moving slides 6 and 5 respectively.

Figure 2- shows a screw threaded shaft. l0 actuated by crank 8 and supported and held in position by bracket I I. The shaft II) extends-through a swivel l2 and engages screw threads in the rear portion of slide 6. The work holding piece. I is shown secured to slide 6 by means of swivel I2, washer I3 and lock screw l4.

Figure 3 illustrates a shaft I! to which is secured a driving gear I5 engaging a gear rack I5 which is bolted to slide 5. Shaft I! has a hexagonal fitting l8 to receive crank 9 for the purpose of actuating gear rack I6 and thereby moving slide 5.

Figure 4 shows a piece of work I9 engaging a machine tool 20 with work holding piece I held in the horizontal plane.

By loosening lock screw 4 the base I may be adjusted about swivel 3 to obtain desired angular relationships between the work I9 and the tool 20, as seen in Figures 5 and 6. Similarly by loosening lock screw I4, work holding piece I is free to move about swivel I2 so as to give additional position relationships between work I9 and tool 20.

Movements of the work I9 in the horizontal plane are controlled by slid es 5 and 6 which as previously described are actuated by cranks 8 and 9.

Thus it is seen that an innumerable amount of combinations of adjustments of the swivels 3 and I2 and slides 5 and 6 may be accomplished to place the work [9 in a great variety of positions with respect to the machine tool 20 without necessitating the removal of the work from the attachment. 1

We claim:

1. An adjustable work holding attachment for positioning work in difierent planes with respect to a machine tool comprising an adjustable sliding means for moving the work linearly in one plane with respect to the tool, an adjustable sliding means for moving the work angularly with respect to the aforesaid means in a plane parallel with said last named means, adjustable swivel means for altering the planes of movement of both of the aforesaid adjustable sliding means and a second adjustable swivel means independent of all the aforementioned adjustable means for altering the position of the work with respect to the tool without removing the work from the attachment.

2. An adjustable work holding attachment for positioning work in different planes with respect to a machine tool comprising two independently adjustable sliding means for moving work linearly and angularly with respect to each other in two parallel planes in combination with two independently adjustable swivel means, one for altering the planes of movement of said adjustable sliding means and the other for altering independently of all aforesaid means the position of the work with respect to the tool without removing the work from the attachment.

3. In an adjustable work holding attachment two manually actuated slides in parallel planes for lines of movement at right angles to each other and a work holding piece attached by an adjustable vertical axis swivel to one of said slides for moving work three ways with respect to a machine tool without changing the plane of the work in combination with an adjustable swiveled supporting base movable about a transverse axis for altering the position of said slides and said work holding piece to obtain more than one plane for the work with respect to the tool without removing the work from the attachment.

4. An adjustable work holding attachment for positioning work in different planes with respect to a machine tool comprising a mounting clamp, a supporting base attached to said mounting clamp by an adjustable swivel, a slide dovetailed to said base, a gear rack integral with said slide, a driving gear engaging said gear rack for moving said slide linearly, a crank for manually actuating said driving gear, a second slide mounted on and dovetailed to the first slide, a screw threaded shaft engaging said second slide, a bracket supporting and holding said shaft, a crank engaging said 'shaft for manually moving the second slide lin- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,457,979 Leavenworth June 5, 1923 1,640,832 J acobowitz Aug. 30, 1927 2,118,912 Armitage May 31, 1938 1,783,540 Hogg et al Dec. 2, 1930 1,889,248 Kilmer Nov. 29, 1932 2,394,202 Pollard Feb. 5, 1946 

